Fortran: Subsume F90 check into ABI check

scivisionrequested to merge
scivision/cmake:f90_first into master

Following design pattern of !4789 (merged) that reduced redundant language checks, check ABI with Fortran 90 code, which virtually all currently maintained and used Fortran compilers support.

Fixes: #22222 (closed)
Topic-rename: Fortran-abi-f90

Edited by Brad King

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